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For other parts of the MPEG-4 standard, see MPEG-4. MPEG-4 is a collection of methods defining compression of audio and visual (AV digital data
"MP4" redirects here. For other uses, see MP4 (disambiguation).
MP4 (MPEG-4 Part 14)
File name extension . A filename extension is a suffix to the name of a Computer file applied to indicate the encoding convention ( File format) of its contents mp4
Internet media type video/mp4
Type code mpg4
Developed by ISO
Type of format Media container
Container for Audio, video, text
Extended from QuickTime .mov

MPEG-4 Part 14, formally ISO/IEC 14496-14:2003, is a multimedia container format standard specified as a part of MPEG-4. An Internet media type, originally called a MIME type after MIME and sometimes a Content-type after the name of a header in several protocols whose value A type code is the only mechanism used in pre- Mac OS X versions of the Macintosh Operating system to denote a file's format, in a manner similar A container format is a computer file format that can contain various types of data compressed by means of standardized audio/video codecs. QuickTime is a Multimedia framework developed by Apple Inc, capable of handling various formats of Digital video, Media clips sound text The International Electrotechnical Commission ( IEC) is a not-for-profit, non-governmental international Standards organization that prepares and publishes Multimedia is media and content that utilizes a combination of different content forms. A container format is a computer file format that can contain various types of data compressed by means of standardized audio/video codecs. MPEG-4 is a collection of methods defining compression of audio and visual (AV digital data It is most commonly used to store digital audio and digital video streams, especially those defined by MPEG, but can also be used to store other data such as subtitles and still images. Digital audio uses Digital signals for Sound reproduction. This includes analog-to-digital conversion, digital-to-analog conversion, storage Digital video is a type of Video recording system that works by using a Digital rather than an analog video signal The Moving Picture Experts Group, commonly referred to as simply MPEG, is a Working group of ISO / IEC charged with the development of video and Subtitles are textual versions of the dialog in films and television programs usually displayed at the bottom of the screen Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. Streaming multimedia is Multimedia that is constantly received by and normally presented to an end-user while it is being delivered by a streaming provider (the The Internet is a global system of interconnected Computer networks The official filename extension for MPEG-4 Part 14 files is . A filename extension is a suffix to the name of a Computer file applied to indicate the encoding convention ( File format) of its contents mp4, thus the container format is often referred to simply as MP4.

Note that many devices advertised as "MP4 players" are simply AMV video capable MP3 players, and do not play MPEG-4 part 14 or any other MPEG-4 format. The name MP4 player is a Chinese marketing term for Portable media players that comply with certain standards and formats AMV is a proprietary video file format, produced for MP4 players as well as S1 MP3 players with video playback MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a Digital audio encoding format using a form of Lossy data compression

Contents

History of MP4

MPEG-4 Part 14 was based on Apple’s QuickTime container format. Apple Inc, ( formerly Apple Computer Inc, is an American Multinational corporation with a focus on designing and manufacturing Consumer electronics QuickTime is a Multimedia framework developed by Apple Inc, capable of handling various formats of Digital video, Media clips sound text [1] MPEG-4 Part 14 is essentially identical to the QuickTime MOV format, but formally specifies support for Initial Object Descriptors (IOD) and other MPEG features. [2]

. MP4 versus . M4A file extensions

The existence of two different file extensions for naming audio-only MP4 files has been a source of confusion among users and multimedia playback software. Since MPEG-4 Part 14 is a container format, MPEG-4 files may contain any number of audio, video, and even subtitle streams, making it impossible to determine the type of streams in an MPEG-4 file based on its filename extension alone. In response, Apple Inc. started using and popularizing the . m4a file extension. Software capable of audio/video playback should recognize files with either . m4a or . mp4 file extensions, as would be expected, as there are no file format differences between the two. Most software capable of creating MPEG-4 audio will allow the user to choose the filename extension of the created MPEG-4 files.

While the only official file extension defined by the standard is . mp4, various file extensions are commonly used to indicate intended content:

The common but non-standard use of the extensions . m4a and . m4v is due to the popularity of Apple’s iPod, the iTunes Store, and the Xbox 360 (in which support for mp4 formatted files was added in the fall 2007 Dashboard update). Apple Inc, ( formerly Apple Computer Inc, is an American Multinational corporation with a focus on designing and manufacturing Consumer electronics iPod is a popular brand of Portable media players designed and marketed by Apple Inc The iTunes Store is a software-based online Digital media store operated by Apple Inc The Xbox 360 is the second Video game console produced by Microsoft, and was developed in cooperation with IBM, ATI, and SiS.

Data streams

Almost any kind of data can be embedded in MPEG-4 Part 14 files through private streams; the widely-supported codecs and additional data streams are:

Some private stream examples include Nero's use of DVD subtitles (Vobsub) in MP4 files. Nero AG is a German software company based in Karlsbad, Germany.

Notes

See also

Competing technologies

Compatible software

Compatible hardware

Notes

  1. ^ Apple Computer. The KMPlayer is a video and audio player for Microsoft Windows which can play a large number of formats such as VCD, DVD KSP (KSP Sound Player or Kalliope Sound Player is a proprietary free audio player for Windows which is developed and distributed by Kalliope s Media Player Classic ( MPC) is a compact media player for Microsoft Windows. MPlayer is a free and Open source media player. The program is available for all major Operating systems including Linux Nero Burning ROM, commonly called just Nero, is a popular optical disc authoring program for Microsoft Windows and Linux by Nero AG Nokia PC Suite is a software package used to establish an interface between Nokia mobile devices and computers that run Microsoft Windows Operating system The Wii Menu is the top level menu interface of the Wii game console QuickTime is a Multimedia framework developed by Apple Inc, capable of handling various formats of Digital video, Media clips sound text RealPlayer (briefly known also as RealOne Player) is a proprietary Cross-platform media player by RealNetworks that plays a number Songbird is a Free software media player and Web browser developed by a group known as Pioneers of the Inevitable (with members who previously Winamp is a proprietary media player written by Nullsoft, now a subsidiary of Time Warner. XBMC Media Center (formerly named " XBox Media Center " is a free and open source Cross-platform media-player and entertainment hub xine (officially ksin is a Multimedia playback engine for Unix-like Operating systems released under the GNU General Public License. Zune is a brand of digital media players and services sold by Microsoft. Archos (ˈɑrkoʊs is a French Consumer electronics company that was established in 1988 by Henri Crohas The HTC TyTN II (also known as the HTC Kaiser and the HTC P4550 is an Internet -enabled Windows Mobile Pocket PC Smartphone designed and marketed The BlackBerry is a Wireless Handheld device introduced in 1999 as a two-way pager The Creative ZEN (formerly known as Creative NOMAD Jukebox Zen) is a range of Digital audio players (DAPs and Portable media players (PMPs made by The iPhone is an internet-connected Multimedia Smartphone designed and marketed by Apple Inc iPod is a popular brand of Portable media players designed and marketed by Apple Inc Motorola SLVR L9, sometimes known as the Motorola L72, is the successor to the Motorola SLVR L7. Neuros Technology is a Chicago Illinois -based company that produces a number of audio and video devices with the brand name Neuros Nokia Nseries is a product family consisting of multimedia smartphones Nokia 5300 Xpress Music, is a Nokia Series 40 third edition mobile phone by Nokia. Nokia 5700 is a music series Mobile phone by Nokia. Overview The Nokia 5700 is a Symbian S60 3rd Edition FP1 smartphone The Nokia 6300 is a mobile telephone handset produced by Nokia. The PlayStation Portable (officially abbreviated PSP) is a Handheld game console manufactured and marketed by Sony Computer Entertainment. The SanDisk Sansa is a line of Flash memory -based Digital audio players and Portable media players produced by SanDisk. Sony Ericsson is a Joint venture established in 2001 by the Japanese Consumer electronics Company Sony Corporation and the Walkman is a popular Sony Brand used to market its portable audio and Video players The Xbox 360 is the second Video game console produced by Microsoft, and was developed in cooperation with IBM, ATI, and SiS. Zune is a brand of digital media players and services sold by Microsoft. MPEG-4 Fact Sheet.
  2. ^ RE: QT vs MPEG-4

External links

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